Hi All,
I'm having a bit of trouble getting a secondary ISP configured on my buildings core switch. The primary ISP connection runs over BGP, and works fine. The second ISP however gave us a modem to connect to. I've configured their modem for IP Passthrough, so it is showing my switch it's public IP address.
I've set up static routes pointing to my building's tenants, who all have firewalls connected to the core switch, and floating static routes to the two ISPs. Then I have NAT set up with ISP 2's interface as the outside interface, and all the interfaces going to the tenants as inside interfaces.
When I go to test the setup, by shutting down the port going to ISP 1, the routing table updates to show the new gateway of last resort going towards ISP 2, but none of my tenants have internet connectivity. I can ping out to the internet from the core switch, and I have connectivity when I ping out with one of the inside interfaces as the source.
Is there something wrong with my configuration, or could it be on ISP 2's side? I've attached an example of how the core switch is configured.
Thank you,
